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REX 521 Distribution Automation Relay Parameter List
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This document is a comprehensive parameter list for the ABB REX 521 distribution automation relay, detailing all configurable settings, input/output signals, and firmware parameters for the 3-phase non-directional overcurrent function (low-set stage). It includes channel visibility codes, value ranges, units, defaults, and explanations for parameters such as operation modes, start current, time multipliers, and recording data.
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